git.sesse.net Git - vlc/blob - src/input/input_dec.c

   1 /*****************************************************************************
   2  * input_dec.c: Functions for the management of decoders
   3  *****************************************************************************
   4  * Copyright (C) 1999-2001 VideoLAN
   5  * $Id: input_dec.c,v 1.77 2003/11/24 02:35:50 fenrir Exp $
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@netcourrier.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <stdlib.h>
  29 #include <string.h>                                    /* memcpy(), memset() */
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/decoder.h>
  33 #include <vlc/vout.h>
  34
  35 #include "stream_output.h"
  36
  37 #include "input_ext-intf.h"
  38 #include "input_ext-plugins.h"
  39
  40 #include "codecs.h"
  41
  42 static decoder_t * CreateDecoder( input_thread_t *, es_descriptor_t *, int );
  43 static int         DecoderThread( decoder_t * );
  44 static void        DeleteDecoder( decoder_t * );
  45
  46 /* Buffers allocation callbacks for the decoders */
  47 static aout_buffer_t *aout_new_buffer( decoder_t *, int );
  48 static void aout_del_buffer( decoder_t *, aout_buffer_t * );
  49
  50 static picture_t *vout_new_buffer( decoder_t * );
  51 static void vout_del_buffer( decoder_t *, picture_t * );
  52
  53 static es_format_t null_es_format = {0};
  54
  55 struct decoder_owner_sys_t
  56 {
  57     aout_instance_t *p_aout;
  58     aout_input_t    *p_aout_input;
  59
  60     vout_thread_t   *p_vout;
  61
  62     sout_packetizer_input_t *p_sout;
  63
  64     /* Current format in use by the output */
  65     video_format_t video;
  66     audio_format_t audio;
  67     es_format_t    sout;
  68
  69     /* fifo */
  70     block_fifo_t *p_fifo;
  71 };
  72
  73
  74 /*****************************************************************************
  75  * input_RunDecoder: spawns a new decoder thread
  76  *****************************************************************************/
  77 decoder_t * input_RunDecoder( input_thread_t * p_input, es_descriptor_t * p_es )
  78 {
  79     decoder_t      *p_dec = NULL;
  80     vlc_value_t    val;
  81     int            i_priority;
  82
  83     /* If we are in sout mode, search for packetizer module */
  84     var_Get( p_input, "sout", &val );
  85     if( !p_es->b_force_decoder && val.psz_string && *val.psz_string )
  86     {
  87         free( val.psz_string );
  88         val.b_bool = VLC_TRUE;
  89
  90         if( p_es->i_cat == AUDIO_ES )
  91         {
  92             var_Get( p_input, "sout-audio", &val );
  93         }
  94         else if( p_es->i_cat == VIDEO_ES )
  95         {
  96             var_Get( p_input, "sout-video", &val );
  97         }
  98
  99         if( val.b_bool )
 100         {
 101             /* Create the decoder configuration structure */
 102             p_dec = CreateDecoder( p_input, p_es, VLC_OBJECT_PACKETIZER );
 103             if( p_dec == NULL )
 104             {
 105                 msg_Err( p_input, "could not create packetizer" );
 106                 return NULL;
 107             }
 108
 109             p_dec->p_module =
 110                 module_Need( p_dec, "packetizer", "$packetizer" );
 111         }
 112     }
 113     else
 114     {
 115         /* Create the decoder configuration structure */
 116         p_dec = CreateDecoder( p_input, p_es, VLC_OBJECT_DECODER );
 117         if( p_dec == NULL )
 118         {
 119             msg_Err( p_input, "could not create decoder" );
 120             return NULL;
 121         }
 122
 123         /* default Get a suitable decoder module */
 124         p_dec->p_module = module_Need( p_dec, "decoder", "$codec" );
 125
 126         if( val.psz_string ) free( val.psz_string );
 127     }
 128
 129     if( !p_dec || !p_dec->p_module )
 130     {
 131         msg_Err( p_dec, "no suitable decoder module for fourcc `%4.4s'.\n"
 132                  "VLC probably does not support this sound or video format.",
 133                  (char*)&p_dec->fmt_in.i_codec );
 134
 135         DeleteDecoder( p_dec );
 136         vlc_object_destroy( p_dec );
 137         return NULL;
 138     }
 139
 140     if ( p_es->i_cat == AUDIO_ES )
 141     {
 142         i_priority = VLC_THREAD_PRIORITY_AUDIO;
 143     }
 144     else
 145     {
 146         i_priority = VLC_THREAD_PRIORITY_VIDEO;
 147     }
 148
 149     /* Spawn the decoder thread */
 150     if( vlc_thread_create( p_dec, "decoder", DecoderThread,
 151                            i_priority, VLC_FALSE ) )
 152     {
 153         msg_Err( p_dec, "cannot spawn decoder thread \"%s\"",
 154                          p_dec->p_module->psz_object_name );
 155         module_Unneed( p_dec, p_dec->p_module );
 156         DeleteDecoder( p_dec );
 157         vlc_object_destroy( p_dec );
 158         return NULL;
 159     }
 160
 161     p_input->stream.b_changed = 1;
 162
 163     return p_dec;
 164 }
 165
 166 /*****************************************************************************
 167  * input_EndDecoder: kills a decoder thread and waits until it's finished
 168  *****************************************************************************/
 169 void input_EndDecoder( input_thread_t * p_input, es_descriptor_t * p_es )
 170 {
 171     decoder_t *p_dec = p_es->p_dec;
 172     int i_dummy;
 173
 174     p_dec->b_die = VLC_TRUE;
 175
 176     /* Make sure the thread leaves the NextDataPacket() function by
 177      * sending it a few null packets. */
 178     for( i_dummy = 0; i_dummy < PADDING_PACKET_NUMBER; i_dummy++ )
 179     {
 180         input_NullPacket( p_input, p_es );
 181     }
 182
 183     if( p_es->p_pes != NULL )
 184     {
 185         input_DecodePES( p_es->p_dec, p_es->p_pes );
 186     }
 187
 188     /* Waiting for the thread to exit */
 189     /* I thought that unlocking was better since thread join can be long
 190      * but it actually creates late pictures and freezes --stef */
 191     /* vlc_mutex_unlock( &p_input->stream.stream_lock ); */
 192     vlc_thread_join( p_dec );
 193     /* vlc_mutex_lock( &p_input->stream.stream_lock ); */
 194
 195 #if 0
 196     /* XXX We don't do it here because of dll loader that want close in the
 197      * same thread than open/decode */
 198     /* Unneed module */
 199     module_Unneed( p_dec, p_dec->p_module );
 200 #endif
 201
 202     /* Delete decoder configuration */
 203     DeleteDecoder( p_dec );
 204
 205     /* Delete the decoder */
 206     vlc_object_destroy( p_dec );
 207
 208     /* Tell the input there is no more decoder */
 209     p_es->p_dec = NULL;
 210
 211     p_input->stream.b_changed = 1;
 212 }
 213
 214 /*****************************************************************************
 215  * input_DecodePES
 216  *****************************************************************************
 217  * Put a PES in the decoder's fifo.
 218  *****************************************************************************/
 219 void input_DecodePES( decoder_t * p_dec, pes_packet_t * p_pes )
 220 {
 221     data_packet_t *p_data;
 222     int     i_size = 0;
 223
 224     for( p_data = p_pes->p_first; p_data != NULL; p_data = p_data->p_next )
 225     {
 226         i_size += p_data->p_payload_end - p_data->p_payload_start;
 227     }
 228     if( i_size > 0 )
 229     {
 230         block_t *p_block = block_New( p_dec, i_size );
 231         if( p_block )
 232         {
 233             uint8_t *p_buffer = p_block->p_buffer;
 234
 235             for( p_data = p_pes->p_first; p_data != NULL; p_data = p_data->p_next )
 236             {
 237                 int i_copy = p_data->p_payload_end - p_data->p_payload_start;
 238
 239                 memcpy( p_buffer, p_data->p_payload_start, i_copy );
 240
 241                 p_buffer += i_copy;
 242             }
 243             p_block->i_pts = p_pes->i_pts;
 244             p_block->i_dts = p_pes->i_dts;
 245             p_block->b_discontinuity = p_pes->b_discontinuity;
 246
 247             block_FifoPut( p_dec->p_owner->p_fifo, p_block );
 248         }
 249     }
 250 }
 251 /*****************************************************************************
 252  * input_DecodeBlock
 253  *****************************************************************************
 254  * Put a block_t in the decoder's fifo.
 255  *****************************************************************************/
 256 void input_DecodeBlock( decoder_t * p_dec, block_t *p_block )
 257 {
 258     block_FifoPut( p_dec->p_owner->p_fifo, p_block );
 259 }
 260
 261 /*****************************************************************************
 262  * Create a NULL packet for padding in case of a data loss
 263  *****************************************************************************/
 264 void input_NullPacket( input_thread_t * p_input,
 265                        es_descriptor_t * p_es )
 266 {
 267     data_packet_t *             p_pad_data;
 268     pes_packet_t *              p_pes;
 269
 270     if( (p_pad_data = input_NewPacketForce( p_input->p_method_data,
 271                     PADDING_PACKET_SIZE)) == NULL )
 272     {
 273         msg_Err( p_input, "no new packet" );
 274         p_input->b_error = 1;
 275         return;
 276     }
 277
 278     memset( p_pad_data->p_payload_start, 0, PADDING_PACKET_SIZE );
 279     p_pad_data->b_discard_payload = 1;
 280     p_pes = p_es->p_pes;
 281
 282     if( p_pes != NULL )
 283     {
 284         p_pes->b_discontinuity = 1;
 285         p_pes->p_last->p_next = p_pad_data;
 286         p_pes->p_last = p_pad_data;
 287         p_pes->i_nb_data++;
 288     }
 289     else
 290     {
 291         if( (p_pes = input_NewPES( p_input->p_method_data )) == NULL )
 292         {
 293             msg_Err( p_input, "no PES packet" );
 294             p_input->b_error = 1;
 295             return;
 296         }
 297
 298         p_pes->i_rate = p_input->stream.control.i_rate;
 299         p_pes->p_first = p_pes->p_last = p_pad_data;
 300         p_pes->i_nb_data = 1;
 301         p_pes->b_discontinuity = 1;
 302         input_DecodePES( p_es->p_dec, p_pes );
 303     }
 304 }
 305
 306 /*****************************************************************************
 307  * input_EscapeDiscontinuity: send a NULL packet to the decoders
 308  *****************************************************************************/
 309 void input_EscapeDiscontinuity( input_thread_t * p_input )
 310 {
 311     unsigned int i_es, i;
 312
 313     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 314     {
 315         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 316
 317         if( p_es->p_dec != NULL )
 318         {
 319             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 320             {
 321                 input_NullPacket( p_input, p_es );
 322             }
 323         }
 324     }
 325 }
 326
 327 /*****************************************************************************
 328  * input_EscapeAudioDiscontinuity: send a NULL packet to the audio decoders
 329  *****************************************************************************/
 330 void input_EscapeAudioDiscontinuity( input_thread_t * p_input )
 331 {
 332     unsigned int i_es, i;
 333
 334     for( i_es = 0; i_es < p_input->stream.i_selected_es_number; i_es++ )
 335     {
 336         es_descriptor_t * p_es = p_input->stream.pp_selected_es[i_es];
 337
 338         if( p_es->p_dec != NULL && p_es->i_cat == AUDIO_ES )
 339         {
 340             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 341             {
 342                 input_NullPacket( p_input, p_es );
 343             }
 344         }
 345     }
 346 }
 347
 348 /*****************************************************************************
 349  * CreateDecoder: create a decoder object
 350  *****************************************************************************/
 351 static decoder_t * CreateDecoder( input_thread_t * p_input,
 352                                   es_descriptor_t * p_es, int i_object_type )
 353 {
 354     decoder_t *p_dec;
 355
 356     p_dec = vlc_object_create( p_input, i_object_type );
 357     if( p_dec == NULL )
 358     {
 359         msg_Err( p_input, "out of memory" );
 360         return NULL;
 361     }
 362
 363     p_dec->pf_decode_audio = 0;
 364     p_dec->pf_decode_video = 0;
 365     p_dec->pf_decode_sub = 0;
 366     p_dec->pf_packetize = 0;
 367
 368     /* Select a new ES */
 369     INSERT_ELEM( p_input->stream.pp_selected_es,
 370                  p_input->stream.i_selected_es_number,
 371                  p_input->stream.i_selected_es_number,
 372                  p_es );
 373
 374     /* Initialize the decoder fifo */
 375     p_dec->p_module = NULL;
 376
 377     p_dec->fmt_in = p_es->fmt;
 378
 379     if( p_es->p_waveformatex )
 380     {
 381 #define p_wf ((WAVEFORMATEX *)p_es->p_waveformatex)
 382         p_dec->fmt_in.audio.i_channels = p_wf->nChannels;
 383         p_dec->fmt_in.audio.i_rate = p_wf->nSamplesPerSec;
 384         p_dec->fmt_in.i_bitrate = p_wf->nAvgBytesPerSec * 8;
 385         p_dec->fmt_in.audio.i_blockalign = p_wf->nBlockAlign;
 386         p_dec->fmt_in.audio.i_bitspersample = p_wf->wBitsPerSample;
 387         p_dec->fmt_in.i_extra = p_wf->cbSize;
 388         p_dec->fmt_in.p_extra = NULL;
 389         if( p_wf->cbSize )
 390         {
 391             p_dec->fmt_in.p_extra = malloc( p_wf->cbSize );
 392             memcpy( p_dec->fmt_in.p_extra, &p_wf[1], p_wf->cbSize );
 393         }
 394     }
 395
 396     if( p_es->p_bitmapinfoheader )
 397     {
 398 #define p_bih ((BITMAPINFOHEADER *) p_es->p_bitmapinfoheader)
 399         p_dec->fmt_in.i_extra = p_bih->biSize - sizeof(BITMAPINFOHEADER);
 400         p_dec->fmt_in.p_extra = NULL;
 401         if( p_dec->fmt_in.i_extra )
 402         {
 403             p_dec->fmt_in.p_extra = malloc( p_dec->fmt_in.i_extra );
 404             memcpy( p_dec->fmt_in.p_extra, &p_bih[1], p_dec->fmt_in.i_extra );
 405         }
 406
 407         p_dec->fmt_in.video.i_width = p_bih->biWidth;
 408         p_dec->fmt_in.video.i_height = p_bih->biHeight;
 409     }
 410
 411     /* FIXME
 412      *  - 1: beurk
 413      *  - 2: I'm not sure there isn't any endian problem here (spu)... */
 414     if( p_es->i_cat == SPU_ES && p_es->p_demux_data )
 415     {
 416         if( ( p_es->i_fourcc == VLC_FOURCC( 's', 'p', 'u', ' ' ) ||
 417               p_es->i_fourcc == VLC_FOURCC( 's', 'p', 'u', 'b' ) ) &&
 418             *((uint32_t*)p_es->p_demux_data) == 0xBeef )
 419         {
 420             memcpy( p_dec->fmt_in.subs.spu.palette,
 421                     p_es->p_demux_data, 17 * 4 );
 422         }
 423         else if( p_es->i_fourcc == VLC_FOURCC( 'd', 'v', 'b', 's' ) )
 424         {
 425             dvb_spuinfo_t *p_dvbs = (dvb_spuinfo_t*)p_es->p_demux_data;
 426
 427             p_dec->fmt_in.subs.dvb.i_id = p_dvbs->i_id;
 428         }
 429     }
 430
 431     p_dec->fmt_in.i_cat = p_es->i_cat;
 432     p_dec->fmt_in.i_codec = p_es->i_fourcc;
 433
 434     p_dec->fmt_out = null_es_format;
 435
 436     /* Allocate our private structure for the decoder */
 437     p_dec->p_owner = (decoder_owner_sys_t*)malloc(sizeof(decoder_owner_sys_t));
 438     if( p_dec->p_owner == NULL )
 439     {
 440         msg_Err( p_dec, "out of memory" );
 441         return NULL;
 442     }
 443     p_dec->p_owner->p_aout = NULL;
 444     p_dec->p_owner->p_aout_input = NULL;
 445     p_dec->p_owner->p_vout = NULL;
 446     p_dec->p_owner->p_sout = NULL;
 447     /* decoder fifo */
 448     if( ( p_dec->p_owner->p_fifo = block_FifoNew( p_dec ) ) == NULL )
 449     {
 450         msg_Err( p_dec, "out of memory" );
 451         return NULL;
 452     }
 453
 454     /* Set buffers allocation callbacks for the decoders */
 455     p_dec->pf_aout_buffer_new = aout_new_buffer;
 456     p_dec->pf_aout_buffer_del = aout_del_buffer;
 457     p_dec->pf_vout_buffer_new = vout_new_buffer;
 458     p_dec->pf_vout_buffer_del = vout_del_buffer;
 459
 460     vlc_object_attach( p_dec, p_input );
 461
 462     return p_dec;
 463 }
 464
 465 /*****************************************************************************
 466  * DecoderThread: the decoding main loop
 467  *****************************************************************************/
 468 static int DecoderThread( decoder_t * p_dec )
 469 {
 470     block_t       *p_block;
 471
 472     /* The decoder's main loop */
 473     while( !p_dec->b_die && !p_dec->b_error )
 474     {
 475         if( ( p_block = block_FifoGet( p_dec->p_owner->p_fifo ) ) == NULL )
 476         {
 477             p_dec->b_error = 1;
 478             break;
 479         }
 480
 481         if( p_dec->i_object_type == VLC_OBJECT_PACKETIZER )
 482         {
 483             block_t *p_sout_block;
 484
 485             while( (p_sout_block = p_dec->pf_packetize( p_dec, &p_block )) )
 486             {
 487                 if( !p_dec->p_owner->p_sout )
 488                 {
 489                     es_format_Copy( &p_dec->p_owner->sout, &p_dec->fmt_out );
 490
 491                     p_dec->p_owner->p_sout =
 492                         sout_InputNew( p_dec, &p_dec->p_owner->sout );
 493
 494                     if( p_dec->p_owner->p_sout == NULL )
 495                     {
 496                         msg_Err( p_dec, "cannot create packetizer output" );
 497                         p_dec->b_error = VLC_TRUE;
 498
 499                         while( p_sout_block )
 500                         {
 501                             block_t       *p_next = p_sout_block->p_next;
 502                             block_Release( p_sout_block );
 503                             p_sout_block = p_next;
 504                         }
 505                         break;
 506                     }
 507                 }
 508
 509                 while( p_sout_block )
 510                 {
 511                     block_t       *p_next = p_sout_block->p_next;
 512                     sout_buffer_t *p_sout_buffer;
 513
 514                     p_sout_buffer =
 515                         sout_BufferNew( p_dec->p_owner->p_sout->p_sout,
 516                                         p_sout_block->i_buffer );
 517                     if( p_sout_buffer == NULL )
 518                     {
 519                         msg_Err( p_dec, "cannot get sout buffer" );
 520                         break;
 521                     }
 522
 523                     memcpy( p_sout_buffer->p_buffer, p_sout_block->p_buffer,
 524                             p_sout_block->i_buffer );
 525
 526                     p_sout_buffer->i_pts = p_sout_block->i_pts;
 527                     p_sout_buffer->i_dts = p_sout_block->i_dts;
 528                     p_sout_buffer->i_length = p_sout_block->i_length;
 529
 530                     block_Release( p_sout_block );
 531
 532                     sout_InputSendBuffer( p_dec->p_owner->p_sout, p_sout_buffer );
 533
 534                     p_sout_block = p_next;
 535                 }
 536             }
 537         }
 538         else if( p_dec->fmt_in.i_cat == AUDIO_ES )
 539         {
 540             aout_buffer_t *p_aout_buf;
 541
 542             while( (p_aout_buf = p_dec->pf_decode_audio( p_dec, &p_block )) )
 543             {
 544                 aout_DecPlay( p_dec->p_owner->p_aout,
 545                               p_dec->p_owner->p_aout_input, p_aout_buf );
 546             }
 547         }
 548         else if( p_dec->fmt_in.i_cat == VIDEO_ES )
 549         {
 550             picture_t *p_pic;
 551
 552             while( (p_pic = p_dec->pf_decode_video( p_dec, &p_block )) )
 553             {
 554                 vout_DatePicture( p_dec->p_owner->p_vout, p_pic, p_pic->date );
 555                 vout_DisplayPicture( p_dec->p_owner->p_vout, p_pic );
 556             }
 557         }
 558         else if( p_dec->fmt_in.i_cat == SPU_ES )
 559         {
 560             p_dec->pf_decode_sub( p_dec, &p_block );
 561         }
 562         else
 563         {
 564             msg_Err( p_dec, "unknown ES format !!" );
 565             p_dec->b_error = 1;
 566             break;
 567         }
 568     }
 569
 570     while( !p_dec->b_die )
 571     {
 572         /* Trash all received PES packets */
 573         p_block = block_FifoGet( p_dec->p_owner->p_fifo );
 574         if( p_block )
 575         {
 576             block_Release( p_block );
 577         }
 578     }
 579
 580     /* XXX We do it here because of dll loader that want close in the
 581      * same thread than open/decode */
 582     /* Unneed module */
 583     module_Unneed( p_dec, p_dec->p_module );
 584
 585     return 0;
 586 }
 587
 588 /*****************************************************************************
 589  * DeleteDecoder: destroys a decoder object
 590  *****************************************************************************/
 591 static void DeleteDecoder( decoder_t * p_dec )
 592 {
 593     vlc_object_detach( p_dec );
 594
 595     msg_Dbg( p_dec,
 596              "killing decoder fourcc `%4.4s', %d PES in FIFO",
 597              (char*)&p_dec->fmt_in.i_codec,
 598              p_dec->p_owner->p_fifo->i_depth );
 599
 600     /* Free all packets still in the decoder fifo. */
 601     block_FifoEmpty( p_dec->p_owner->p_fifo );
 602     block_FifoRelease( p_dec->p_owner->p_fifo );
 603
 604    /* Cleanup */
 605     if( p_dec->p_owner->p_aout_input )
 606         aout_DecDelete( p_dec->p_owner->p_aout, p_dec->p_owner->p_aout_input );
 607
 608     if( p_dec->p_owner->p_vout )
 609     {
 610         int i_pic;
 611
 612         /* Hack to make sure all the the pictures are freed by the decoder */
 613         for( i_pic = 0; i_pic < p_dec->p_owner->p_vout->render.i_pictures;
 614              i_pic++ )
 615         {
 616             if( p_dec->p_owner->p_vout->render.pp_picture[i_pic]->i_status ==
 617                 RESERVED_PICTURE )
 618                 vout_DestroyPicture( p_dec->p_owner->p_vout,
 619                     p_dec->p_owner->p_vout->render.pp_picture[i_pic] );
 620             if( p_dec->p_owner->p_vout->render.pp_picture[i_pic]->i_refcount
 621                 > 0 )
 622                 vout_UnlinkPicture( p_dec->p_owner->p_vout,
 623                     p_dec->p_owner->p_vout->render.pp_picture[i_pic] );
 624         }
 625
 626         /* We are about to die. Reattach video output to p_vlc. */
 627         vout_Request( p_dec, p_dec->p_owner->p_vout, 0, 0, 0, 0 );
 628     }
 629
 630     if( p_dec->p_owner->p_sout )
 631         sout_InputDelete( p_dec->p_owner->p_sout );
 632
 633     free( p_dec->p_owner );
 634 }
 635
 636 /*****************************************************************************
 637  * Buffers allocation callbacks for the decoders
 638  *****************************************************************************/
 639 static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
 640 {
 641     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 642     aout_buffer_t *p_buffer;
 643
 644     if( p_sys->p_aout_input != NULL &&
 645         ( p_dec->fmt_out.audio.i_rate != p_sys->audio.i_rate ||
 646           p_dec->fmt_out.audio.i_original_channels !=
 647               p_sys->audio.i_original_channels ||
 648           p_dec->fmt_out.audio.i_bytes_per_frame !=
 649               p_sys->audio.i_bytes_per_frame ) )
 650     {
 651         /* Parameters changed, restart the aout */
 652         aout_DecDelete( p_sys->p_aout, p_sys->p_aout_input );
 653         p_sys->p_aout_input = NULL;
 654     }
 655
 656     if( p_sys->p_aout_input == NULL )
 657     {
 658         p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
 659         p_sys->audio = p_dec->fmt_out.audio;
 660         p_sys->p_aout_input =
 661             aout_DecNew( p_dec, &p_sys->p_aout, &p_sys->audio );
 662         if( p_sys->p_aout_input == NULL )
 663         {
 664             msg_Err( p_dec, "failed to create audio output" );
 665             p_dec->b_error = VLC_TRUE;
 666             return NULL;
 667         }
 668         p_dec->fmt_out.audio.i_bytes_per_frame =
 669             p_sys->audio.i_bytes_per_frame;
 670     }
 671
 672     p_buffer = aout_DecNewBuffer( p_sys->p_aout, p_sys->p_aout_input,
 673                                   i_samples );
 674
 675     return p_buffer;
 676 }
 677
 678 static void aout_del_buffer( decoder_t *p_dec, aout_buffer_t *p_buffer )
 679 {
 680     aout_DecDeleteBuffer( p_dec->p_owner->p_aout,
 681                           p_dec->p_owner->p_aout_input, p_buffer );
 682 }
 683
 684 static picture_t *vout_new_buffer( decoder_t *p_dec )
 685 {
 686     decoder_owner_sys_t *p_sys = (decoder_owner_sys_t *)p_dec->p_owner;
 687     picture_t *p_pic;
 688
 689     if( p_sys->p_vout == NULL ||
 690         p_dec->fmt_out.video.i_width != p_sys->video.i_width ||
 691         p_dec->fmt_out.video.i_height != p_sys->video.i_height ||
 692         p_dec->fmt_out.video.i_chroma != p_sys->video.i_chroma ||
 693         p_dec->fmt_out.video.i_aspect != p_sys->video.i_aspect )
 694     {
 695         if( !p_dec->fmt_out.video.i_width ||
 696             !p_dec->fmt_out.video.i_height )
 697         {
 698             /* Can't create a new vout without display size */
 699             return NULL;
 700         }
 701
 702         p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
 703         p_sys->video = p_dec->fmt_out.video;
 704
 705         p_sys->p_vout = vout_Request( p_dec, p_sys->p_vout,
 706                                       p_sys->video.i_width,
 707                                       p_sys->video.i_height,
 708                                       p_sys->video.i_chroma,
 709                                       p_sys->video.i_aspect );
 710
 711         if( p_sys->p_vout == NULL )
 712         {
 713             msg_Err( p_dec, "failed to create video output" );
 714             p_dec->b_error = VLC_TRUE;
 715             return NULL;
 716         }
 717     }
 718
 719     /* Get a new picture */
 720     while( !(p_pic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 ) ) )
 721     {
 722         if( p_dec->b_die || p_dec->b_error )
 723         {
 724             return NULL;
 725         }
 726         msleep( VOUT_OUTMEM_SLEEP );
 727     }
 728
 729     return p_pic;
 730 }
 731
 732 static void vout_del_buffer( decoder_t *p_dec, picture_t *p_pic )
 733 {
 734     vout_DestroyPicture( p_dec->p_owner->p_vout, p_pic );
 735 }